US3687150A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Proportional fluidic gain changer
Assignee: Honeywell Inc
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Filing: 1970-08-10
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Granted: 1972-08-29
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Expires: 1990-08-10
Abstract
Abstract A fluid gain changer comprising two proportional fluid amplifiers. Fluid is supplied at oppositely varying pressures to an input port of the first amplifier and an input port of the second amplifier. In both amplifiers the input fluid along with a first biasing fluid and a second biasing fluid acts upon a fluid source. The circuit gain is changed by varying the first biasing fluid. The circuit output signal is produced between an outlet passage of the first amplifier and an outlet passage of the second amplifier.
Inventors
- 👤 Michael J Hoglund
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:46
CPC Classifications
F; F15; F15C; F15C1/00; F15C1/14; Y; Y10; Y10T; Y10T137/00; Y10T137/206; Y10T137/212; Y10T137/2125; Y10T137/2142; Y10T137/2147; Y10T137/2158
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
246 words
A fluidic dynamic gain changer comprising: first proportional amplifier means having a power nozzle for receiving fluid from a fluid source, a first control port, a second control port, a third control port, and first and second outlet passages; second proportional fluid amplifier means having a power nozzle for receiving fluid from a fluid source, a first control port, a second control port, a third control port, and first and second outlet passages; said first, second and third control ports of the first and second proportional amplifiers having the same orientation with respect to the first and second power nozzles; input means for supplying an input differential pressure signal to the first control port of said first amplifier and the first control port of said second amplifier; pressure biasing means connected to the second control port of said first amplifier and the second control port of said second amplifier for supplying fluid thereto at a common fixed pressure; and pressure biasing means connected to the third control port of said first amplifier and the third control port of said second amplifier for supplying fluid thereto at a common variable pressure, whereby a fluid output signal is produced between the second outlet passage of said first amplifier and the second outlet passage of said second amplifier, the magnitude of the fluid output signal being dependent upon the differential pressure supplied by said input means, the pressure from said fluid source, said fixed pressure, and said variable pressure.
Claim 2
Dependent Claim
246 words
A fluidic dynamic gain changer comprising: first proportional amplifier means having a power nozzle for receiving fluid from a fluid source, a first control port, a second control port, a third control port, and first and second outlet passages; second proportional fluid amplifier means having a power nozzle for receiving fluid from a fluid source, a first control port, a second control port, a third control port, and first and second outlet passages; said first, second and third control ports of the first and second proportional amplifiers having the same orientation with respect to the first and second power nozzles; input means for supplying an input differential pressure signal to the first control port of said first amplifier and the first control port of said second amplifier; pressure biasing means connected to the second control port of said first amplifier and the second control port of said second amplifier for supplying fluid thereto at a common fixed pressure; and pressure biasing means connected to the third control port of said first amplifier and the third control port of said second amplifier for supplying fluid thereto at a common variable pressure, whereby a fluid output signal is produced between the second outlet passage of said first amplifier and the second outlet passage of said second amplifier, the magnitude of the fluid output signal being dependent upon the differential pressure supplied by said input means, the pressure from said fluid source, said fixed pressure, and said variable pressure.
Claim 3
Dependent Claim
297 words
A fluid dynamic gain changer comprising: first proportional fluid amplifier means having a power nozzle, first and second control ports, and first and second output passages; input means for supplying an input differential pressure to said first and second control ports; second proportional fluid amplifier means having a power nozzle for receiving fluid from a fluid source, a first control port, a second control port, a third control port, and first and second outlet passages; means connecting the first outlet passage of said first amplifier to the first control port of said second amplifier; third proportional fluid amplifier means having a power nozzle, for receiving fluid from a fluid source, a first control port, a second control port, a third control port, and first and second outlet passages; said first, second and third control ports of the second and third proportional amplifiers having the same orientation with respect to the second and third power nozzles; means connecting the second outlet passage of said first amplifier to the first control port of said third amplifier; pressure biasing means connected to the second control port of said second amplifier and the second control port of said third amplifier for supplying fluid thereto at a common fixed pressure; and pressure biasing means connected to the third control port of said second amplifier and the third control port of said third amplifier for supplying fluid thereto at a common variable pressure, whereby a fluid output signal is produced between the second outlet passage of said second amplifier and the second outlet passage of said third amplifier, the magnitude of the fluid output signal being dependent upon the differential pressure supplied to the control ports of said first amplifier, the pressure from said fluid source, said fixed pressure, and said variable pressure.
Claim 4
Dependent Claim
297 words
A fluid dynamic gain changer comprising: first proportional fluid amplifier means having a power nozzle, first and second control ports, and first and second output passages; input means for supplying an input differential pressure to said first and second control ports; second proportional fluid amplifier means having a power nozzle for receiving fluid from a fluid source, a first control port, a second control port, a third control port, and first and second outlet passages; means connecting the first outlet passage of said first amplifier to the first control port of said second amplifier; third proportional fluid amplifier means having a power nozzle, for receiving fluid from a fluid source, a first control port, a second control port, a third control port, and first and second outlet passages; said first, second and third control ports of the second and third proportional amplifiers having the same orientation with respect to the second and third power nozzles; means connecting the second outlet passage of said first amplifier to the first control port of said third amplifier; pressure biasing means connected to the second control port of said second amplifier and the second control port of said third amplifier for supplying fluid thereto at a common fixed pressure; and pressure biasing means connected to the third control port of said second amplifier and the third control port of said third amplifier for supplying fluid thereto at a common variable pressure, whereby a fluid output signal is produced between the second outlet passage of said second amplifier and the second outlet passage of said third amplifier, the magnitude of the fluid output signal being dependent upon the differential pressure supplied to the control ports of said first amplifier, the pressure from said fluid source, said fixed pressure, and said variable pressure.
References Cited (Backward Citations)
US3429249A
Cited
US3568698A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-08-29 | 1976-02-28 | 1976-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-29 | 1980-02-28 | 1980-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-29 | 1984-02-28 | 1984-08-29 | $7700.00 | Window Closed / Lapsed |